Guido has learned that on the wall of the first floor of BBC Millbank there is a self-congratulatory note saying that they sold 100 cakes for Children in Need at £1 each. However, the note points out testily that there is only £80 in the honesty box. What Guido wants to know is who stole the cakes from Children in Need?

Millbank is the base for the BBC’s Westminster Lobby correspondents. Trust is the key issue in political reporting…